EP1811068A1 - Frein de trame avec commande - Google Patents

Frein de trame avec commande Download PDF

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Publication number
EP1811068A1
EP1811068A1 EP06126959A EP06126959A EP1811068A1 EP 1811068 A1 EP1811068 A1 EP 1811068A1 EP 06126959 A EP06126959 A EP 06126959A EP 06126959 A EP06126959 A EP 06126959A EP 1811068 A1 EP1811068 A1 EP 1811068A1
Authority
EP
European Patent Office
Prior art keywords
brake
electromagnet
lever
yarn
band
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP06126959A
Other languages
German (de)
English (en)
Other versions
EP1811068B1 (fr
Inventor
Marcel Christe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Itema Switzerland Ltd
Original Assignee
Sultex AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sultex AG filed Critical Sultex AG
Priority to EP06126959A priority Critical patent/EP1811068B1/fr
Publication of EP1811068A1 publication Critical patent/EP1811068A1/fr
Application granted granted Critical
Publication of EP1811068B1 publication Critical patent/EP1811068B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/10—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by devices acting on running material and not associated with supply or take-up devices
    • B65H59/20—Co-operating surfaces mounted for relative movement
    • B65H59/22—Co-operating surfaces mounted for relative movement and arranged to apply pressure to material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2555/00—Actuating means
    • B65H2555/10—Actuating means linear
    • B65H2555/13—Actuating means linear magnetic, e.g. induction motors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • the invention relates to a controlled thread brake for braking a weft thread in a loom according to the preamble of claim 1 and a loom with such a thread brake.
  • a thread brake is usually provided between the supply spools for the weft thread and the shed in order to decelerate the weft thread at the end of the weft insertion.
  • Newer weaving machines are provided with controlled thread brakes which allow the weft yarn to be braked in any phase of the weft insertion.
  • document EP 0 475 892 A1 discloses such a thread brake with a brake band and a movable brake body, which is connected to a servomotor such that the rotational movement of the servomotor is converted into a lifting movement of the brake body. In this way it is possible to control both the time of the brake application and the force exerted on the weft yarn braking force via the servomotor.
  • the object of the invention is to provide a controlled yarn brake for braking a weft thread in a loom and a loom with such a thread brake available, which has a shorter reaction time than the above-described prior art, and which is relatively inexpensive to produce.
  • the controlled yarn brake according to the present invention for braking a weft thread in a weaving machine comprises a brake band, for example a flexible or flexible brake band, and a brake body, which may be stationary and / or fixed, for example.
  • the thread brake comprises an electromagnet and a rotatable or tiltable lever, which is movable by means of the electromagnet, and which is operatively connected to the brake band to exert a train in the longitudinal direction of the brake band and apply the same for braking the weft thread to the brake body or press
  • the thread brake comprises two or more brake body and in a further advantageous embodiment of the or the brake body are provided with a rounded shape and / or formed as a passive braking elements.
  • the brake band can be fixedly or elastically connected to a holder at a first fastening point, for example on one side of the brake band, and fixed in the longitudinal direction thereof, for example on the other side, firmly or elastically with the lever.
  • the thread brake comprises a spring element for releasing the thread brake, for example a tension or compression spring, which acts on the lever and / or a leg spring in the pivot point of the lever.
  • the brake band may be provided with a bias, so that it is effective as a spring element for releasing the thread brake.
  • the lever is formed straight or angled.
  • the pivot point of the lever may for example be arranged between the brake band and the electromagnet or on one side of the side of the Brake band or the electromagnet.
  • the lever is arranged substantially at right angles to the brake band.
  • an armature of the electromagnet which armature contains a ferromagnetic or permanent magnetic material, is provided on the lever, for example by the lever or a part thereof being designed as an armature.
  • the thread brake may comprise at least a second electromagnet, by means of which the lever and / or the brake band are movable, and which may be used for example as a fan magnet and / or as a support of the first electromagnet.
  • the electromagnet has a U-shaped core or the electromagnet is designed as a pot magnet, wherein the magnetic field passes through the armature.
  • an air gap is provided between the armature and the or the electromagnet during braking. In this way it is possible to adjust the braking force during braking via the current flowing through the electromagnet.
  • the invention comprises a weaving machine with at least one thread brake according to one of the embodiments described above.
  • the yarn brake according to the invention is a fast-acting yarn brake, which is particularly suitable for high-speed weaving machines with weft insertion numbers of, for example, 500 weft / min. and higher.
  • the paths of the moving parts can be kept small, for example, 1 mm or less, so that the achievable reaction time is less than 10 ms.
  • the thread brake according to the invention has a useful self-cleaning effect when the brake band 1 to 2 mm is released, so that the brake bath with brake application against the brake body claps.
  • Another advantage is the comparatively low production costs of the yarn brake described and the simple and cost-effective control.
  • Fig. 1 shows an oblique view
  • Fig. 2 is a side view of an embodiment of a yarn brake according to the present invention.
  • the yarn brake 1 shown for braking a weft thread 10 in one Weaving machine comprises a brake band 3, which may for example be designed as a flexible and / or flexible band, for example as a steel band, and a brake body 2, which is advantageously provided with an abrasion-resistant surface, for example with a ceramic plate on the top or a coating of a ceramic material or hard chrome.
  • the yarn brake 10 of the embodiment comprises an electromagnet 6 and a rotatable or tiltable lever 4 which can be moved by means of the electromagnet, and which is operatively connected to the brake band 3 to exert a train in the longitudinal direction of the brake band and the same for braking the weft thread 10 to apply to the brake body 2.
  • the or the brake body are designed as passive brake organs.
  • the brake band may be fixedly or elastically connected to a holder 8 at a first fastening point, for example on one side of the brake band, and fixed in the longitudinal direction at a second attachment point, for example on the other side, fixedly or elastically with the lever 4.
  • the yarn brake comprises a spring element to release the yarn brake when power is off, for example, a tension or compression spring acting on the lever and / or a leg spring in the pivot point of the lever.
  • the brake band can be provided with a bias, so that the same is effective as a spring element for releasing the thread brake.
  • the brake band is slightly deflected by the brake body 2, so that this is applied to the brake body 2, when the electromagnet 6 via the lever 4 exerts a train in the longitudinal direction of the brake band, and between brake band and Brake body inserted weft 10 is clamped.
  • the lever 4 can, as shown in Figures 1 and 2, be straight and the pivot point of the lever can be arranged between the brake band and the electromagnet. However, it is also possible to provide angled levers and / or to arrange the pivot point on one side on the side of the brake band or the electromagnet. Im shown Embodiment, the lever 4 is arranged substantially perpendicular to the brake band 3, and the same attached to the lever.
  • an armature 5 of the electromagnet 6 is provided on the lever 4, for example by the lever or part thereof being designed as an armature.
  • the armature or the part 5 of the lever designed as an armature expediently contains a magnetically active region of a ferromagnetic or permanent magnetic material, for example a soft magnetic steel or, in the case of a permanent magnetic material, e.g. from ALNICO. If a permanently magnetic material is provided in the armature, the solenoid can also be used to release the brake band by reversing the flow of current.
  • the electromagnet has a U-shaped core or the electromagnet is designed as a pot magnet, wherein upon excitation of the electromagnet, the magnetic circuit is closed by the armature to an air gap.
  • Figures 1 and 2 show the yarn brake 1 during braking, i. the solenoid biases over the lever 4, the brake band 3, so that this rests on the brake body 2 and the weft thread 10 is clamped between the brake band and brake body.
  • an air gap is present between the armature 5 and the electromagnet 6 during braking. In this way, it is possible to adjust the braking force during braking over the current flowing through the electromagnet, wherein the braking force is approximately proportional to the current.
  • Fig. 3A shows a side view of a second embodiment of a yarn brake according to the present invention during braking.
  • the yarn brake shown in Fig. 3A differs from that shown in Figures 1 and 2 only by a second electromagnet 6 '.
  • the yarn brake 1 comprises a brake band 3 and a brake body 2, and in addition a first electromagnet 6 and a rotatable or tiltable lever 4, which is operatively connected to the brake band 3 to a Train or exert pressure in the longitudinal direction of the brake band.
  • the lever 4 is in the second embodiment by means of the two electromagnets 6, 6 'movable, wherein the first example, as described above, can be used for braking and the second example, for releasing the brake band.
  • Fig. 3A the yarn brake 1 is shown during braking, i. the first solenoid 6 biases over the lever 4, the brake band 3, so that this rests on the brake body 2 and the weft thread 10 is clamped between the brake band and brake body.
  • the second electromagnet 6 ' is turned off during braking in the embodiment shown in Fig. 3A.
  • the importance of the air gap between the first electromagnet 6 and the armature 5 during braking has already been discussed in the description of the first embodiment.
  • a part of the lever 4 is formed as an armature 5, wherein the two electromagnets e.g. can be arranged on opposite sides of the armature, each with an air gap between the electromagnet and the armature.
  • the two electromagnets e.g. can be arranged on opposite sides of the armature, each with an air gap between the electromagnet and the armature.
  • a magnetically conductive yoke can be provided, on which the two electromagnets are arranged, so that the yoke with the electromagnets 6, 6 'and the armature 5 except for the air gaps a closed magnetic circuit forms.
  • Fig. 3B shows a side view of the embodiment shown in Fig. 3A with the ventilated yarn brake.
  • the yarn brake shown in Fig. 3B differs from that shown in Fig. 3A only by the excitation of the second electromagnet 6 'and the position of the lever 4 and the state of the brake band 3.
  • the second electromagnet 6' over the Lever 4, the brake band 3, so that it is lifted from the brake body 2 and the weft thread 10 can be freely guided through the gap between the brake band and brake body, the gap is typically 1 to 2 mm.
  • the first electromagnet 6 is switched off in the embodiment shown in FIG. 3B during the release of the yarn brake.
  • An air gap between the second electromagnet 6 'and the armature 5 during venting may be provided be, but is not required in most cases, since it can be dispensed with a force control when airing.
  • the controlled yarn brake for braking a weft thread according to the present application can be used on various weaving machine types such as projectile and rapier, and is particularly suitable for fast-running weaving machines, since the paths of the lever and the brake band can be kept small and the thread brake reacts quickly accordingly. It is also advantageous that the yarn brake is also suitable for very coarse yarns thanks to the large braking force range.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP06126959A 2006-01-24 2006-12-22 Frein de trame avec commande Active EP1811068B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06126959A EP1811068B1 (fr) 2006-01-24 2006-12-22 Frein de trame avec commande

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP06405031 2006-01-24
EP06126959A EP1811068B1 (fr) 2006-01-24 2006-12-22 Frein de trame avec commande

Publications (2)

Publication Number Publication Date
EP1811068A1 true EP1811068A1 (fr) 2007-07-25
EP1811068B1 EP1811068B1 (fr) 2009-06-17

Family

ID=36035637

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06126959A Active EP1811068B1 (fr) 2006-01-24 2006-12-22 Frein de trame avec commande

Country Status (5)

Country Link
US (1) US20070169830A1 (fr)
EP (1) EP1811068B1 (fr)
JP (1) JP2007197893A (fr)
CN (1) CN101008125A (fr)
DE (1) DE502006003985D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2354070A1 (fr) 2010-02-01 2011-08-10 Iro Ab Tensionneur de fil

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10150504A1 (de) * 2001-10-12 2003-04-17 Iropa Ag Fadenbremse
US7543610B2 (en) * 2006-06-16 2009-06-09 Sultex Ag Thread clamp for a rapier head
WO2009025803A1 (fr) 2007-08-20 2009-02-26 Kevin Kremeyer Systèmes de dépôt d'énergie, équipement et procédés permettant de modifier et de commander des ondes de choc et un écoulement supersonique
WO2012174514A1 (fr) * 2011-06-16 2012-12-20 American Linc, Llc Ensemble rouleau de suralimentation, textile et procédé de réglage de la tension d'un fil se déplaçant
US10669653B2 (en) * 2015-06-18 2020-06-02 Kevin Kremeyer Directed energy deposition to facilitate high speed applications
ITUB20155266A1 (it) * 2015-10-30 2016-01-30 Roj S R L Freno elettromagnetico pilotato per il controllo della tensione dei fili di trama in macchine tessili
CN108950823B (zh) * 2018-09-20 2023-04-14 太平洋纺织机械（常熟）有限公司 用于剑杆织机的纬纱张力控制装置

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3929169A (en) * 1973-04-03 1975-12-30 Sulzer Ag Thread brake
US4431036A (en) * 1981-01-30 1984-02-14 Sulzer Brothers Limited Mechanism for braking a weft yarn in a weaving machine
EP0475892A1 (fr) * 1990-09-10 1992-03-18 Sulzer RàœTi Ag Frein de fil pour métiers à tisser
US5398731A (en) * 1993-03-05 1995-03-21 Lindauer Dornier Gesellschaft Mbh Lamellar weft thread brake mechanism with a variable braking force
EP1072707A1 (fr) * 1999-06-01 2001-01-31 L.G.L. Electronics S.p.A. Dispositif d'actionnement du frein de fil de trame, en particulier pour métiers à tisser et similaires
EP1095893A2 (fr) * 1999-10-26 2001-05-02 L.G.L. Electronics S.p.A. Frein de fil de trame, plus particulièrement pour métiers à tisser
US20010022201A1 (en) * 2000-03-18 2001-09-20 Heinz-Peter Loehr Thread brake for weaving looms
US20030075230A1 (en) * 2001-10-19 2003-04-24 Lindauer Dornier Gesellschaft Mbh Method and apparatus for variably braking the weft thread between a supply spool and a thread store in a loom

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IT1310749B1 (it) * 1999-11-30 2002-02-22 Lgl Electronics Spa Metodo e dispositivo di controllo di freni di trama elettrocomandatiper la regolazione automatica della tensione meccanica del filo di
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EP1338688B1 (fr) * 2002-02-25 2008-10-08 GIVIDI-Italia S.p.A. Pince à fil pour une lance d'une machine à tisser à lances
US7543610B2 (en) * 2006-06-16 2009-06-09 Sultex Ag Thread clamp for a rapier head
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Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3929169A (en) * 1973-04-03 1975-12-30 Sulzer Ag Thread brake
US4431036A (en) * 1981-01-30 1984-02-14 Sulzer Brothers Limited Mechanism for braking a weft yarn in a weaving machine
EP0475892A1 (fr) * 1990-09-10 1992-03-18 Sulzer RàœTi Ag Frein de fil pour métiers à tisser
US5398731A (en) * 1993-03-05 1995-03-21 Lindauer Dornier Gesellschaft Mbh Lamellar weft thread brake mechanism with a variable braking force
EP1072707A1 (fr) * 1999-06-01 2001-01-31 L.G.L. Electronics S.p.A. Dispositif d'actionnement du frein de fil de trame, en particulier pour métiers à tisser et similaires
EP1095893A2 (fr) * 1999-10-26 2001-05-02 L.G.L. Electronics S.p.A. Frein de fil de trame, plus particulièrement pour métiers à tisser
US20010022201A1 (en) * 2000-03-18 2001-09-20 Heinz-Peter Loehr Thread brake for weaving looms
US20030075230A1 (en) * 2001-10-19 2003-04-24 Lindauer Dornier Gesellschaft Mbh Method and apparatus for variably braking the weft thread between a supply spool and a thread store in a loom

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2354070A1 (fr) 2010-02-01 2011-08-10 Iro Ab Tensionneur de fil

Also Published As

Publication number Publication date
DE502006003985D1 (de) 2009-07-30
US20070169830A1 (en) 2007-07-26
CN101008125A (zh) 2007-08-01
EP1811068B1 (fr) 2009-06-17
JP2007197893A (ja) 2007-08-09

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